I assume this is a classic lol.
Got this from a coworker who built it ~20 years ago. I looked up Coppi and looks like a bunch of companies built bikes with his name on it.
He doesn't remember what the manufacturer is and I am not sure how to find out the details. I don't need to know this, just want to get to know my bike as much as I can.
Obviously, if anyone can look and say "Oh that is a such and such" then cool, otherwise... What markings, details could I look for to tell who actually made this?